From badae5b82cdd3bde3b0150330fcb4ebc13c59965 Mon Sep 17 00:00:00 2001
From: Imre Deak <imre.deak@intel.com>
Date: Tue, 16 Jun 2020 17:18:53 +0300
Subject: drm/i915/dp_mst: Clear only the ACT sent flag from DP_TP_STATUS
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Git-commit: 3d289d2578eff2a274fc5e63fca2a611404a3003
Patch-mainline: v5.9-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322
It's not clear if the DP_TP_STATUS flags other than the ACT sent flag
have some side-effect, so don't clear those; we don't depend on the
state of these flags anyway.
Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200616141855.746-4-imre.deak@intel.com
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/i915/display/intel_dp_mst.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
index 3977ee4f7176..b66b56a070e5 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -322,7 +322,7 @@ static void clear_act_sent(struct intel_dp *intel_dp)
struct drm_i915_private *i915 = dp_to_i915(intel_dp);
intel_de_write(i915, intel_dp->regs.dp_tp_status,
- intel_de_read(i915, intel_dp->regs.dp_tp_status));
+ DP_TP_STATUS_ACT_SENT);
}
static void wait_for_act_sent(struct intel_dp *intel_dp)
--
2.29.2